tofsee | b7a610c7f989b5fc0b92106990ecf5a79c87d70f18365e2ec5b096e5e3af6379

Analysis

max time kernel
147s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 04:46

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General

Target
f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe
Size 13.5MB
Sample240415-fd541seh27
SHA256 b7a610c7f989b5fc0b92106990ecf5a79c87d70f18365e2ec5b096e5e3af6379
MD5 f0571d537fdfb84ba04c35bf28fc6efd
SHA1 dd7312afd7271ca7fcda619a8d727028ffb8ba68
SHA512 7f4f75c788014b865497f7cf64c13db8fcc8f4b2211b716baab4d2f0d0b251f7110b598694e984b6d1cf8572323f35ea6d61100f52fbb0a2cd6cd052c59d8dcc
SSDEEP 24576:YjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBb:Ynh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

defeatwax.ru
refabyd.info

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
5004	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\bbfgbkyt\ImagePath = "C:\\Windows\\SysWOW64\\bbfgbkyt\\pyocdrgm.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
2476	pyocdrgm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2476 set thread context of 1372	2476	pyocdrgm.exe	108

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3276	sc.exe
4124	sc.exe
2708	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 2440	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	90
PID 4236 wrote to memory of 2440	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	90
PID 4236 wrote to memory of 2440	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	90
PID 4236 wrote to memory of 3376	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	94
PID 4236 wrote to memory of 3376	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	94
PID 4236 wrote to memory of 3376	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	94
PID 4236 wrote to memory of 3276	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	97
PID 4236 wrote to memory of 3276	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	97
PID 4236 wrote to memory of 3276	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	97
PID 4236 wrote to memory of 4124	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	101
PID 4236 wrote to memory of 4124	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	101
PID 4236 wrote to memory of 4124	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	101
PID 4236 wrote to memory of 2708	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	103
PID 4236 wrote to memory of 2708	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	103
PID 4236 wrote to memory of 2708	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	103
PID 4236 wrote to memory of 5004	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	106
PID 4236 wrote to memory of 5004	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	106
PID 4236 wrote to memory of 5004	4236	f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe	106
PID 2476 wrote to memory of 1372	2476	pyocdrgm.exe	108
PID 2476 wrote to memory of 1372	2476	pyocdrgm.exe	108
PID 2476 wrote to memory of 1372	2476	pyocdrgm.exe	108
PID 2476 wrote to memory of 1372	2476	pyocdrgm.exe	108
PID 2476 wrote to memory of 1372	2476	pyocdrgm.exe	108

C:\Users\Admin\AppData\Local\Temp\f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bbfgbkyt\
  2⤵
  PID:2440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pyocdrgm.exe" C:\Windows\SysWOW64\bbfgbkyt\
  2⤵
  PID:3376
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create bbfgbkyt binPath= "C:\Windows\SysWOW64\bbfgbkyt\pyocdrgm.exe /d\"C:\Users\Admin\AppData\Local\Temp\f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:3276
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description bbfgbkyt "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:4124
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start bbfgbkyt
  2⤵
  - Launches sc.exe
  PID:2708
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:5004

C:\Windows\SysWOW64\bbfgbkyt\pyocdrgm.exe
C:\Windows\SysWOW64\bbfgbkyt\pyocdrgm.exe /d"C:\Users\Admin\AppData\Local\Temp\f0571d537fdfb84ba04c35bf28fc6efd_JaffaCakes118.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2476
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  PID:1372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

pyocdrgm.exe

Path C:\Users\Admin\AppData\Local\Temp\pyocdrgm.exe
Size 10.0MB
SHA256 f596c9388532fecccd1cce39ce9cd543d1a16a8bc7ca4dc9c7c6f4015ec99c5e
MD5 bf9f36222a56fdff2858b65b610ef825
SHA1 be6dcb23734454bd74d6367906817f5c96a20c94
SHA512 f2e24ef28fa573b04757d09d217870f6c4a8f6e431b397cde62d448e46ad7e65c61128afce3b241270f42fb2fbabbf7b6e694527a677e92754c5102e8359897b
SSDEEP 24576:QjDuKnh7YzbKBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBb:Qnh
MD5 SHA1 SHA512 SSDEEP

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memory/1372-11-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/1372-26-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/1372-17-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/1372-16-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/1372-14-0x0000000000580000-0x0000000000595000-memory.dmp

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memory/2476-9-0x00000000005F0000-0x0000000000603000-memory.dmp

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memory/2476-10-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/2476-8-0x00000000004C0000-0x00000000005C0000-memory.dmp

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memory/2476-18-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4236-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

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memory/4236-15-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4236-3-0x0000000000400000-0x000000000046E000-memory.dmp

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memory/4236-24-0x00000000004E0000-0x00000000005E0000-memory.dmp

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memory/4236-2-0x0000000002070000-0x0000000002083000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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